Add base PickerOptions + some formatting

src/Avalonia.Base/Platform/Storage/FilePickerFileType.cs

@@ -5,7 +5,7 @@ namespace Avalonia.Platform.Storage;
 /// <summary>
 /// Represents a name mapped to the associated file types (extensions).
 /// </summary>
-public class FilePickerFileType
+public sealed class FilePickerFileType
 {
     public FilePickerFileType(string name)
     {

src/Avalonia.Base/Platform/Storage/FilePickerOpenOptions.cs

@@ -5,25 +5,15 @@ namespace Avalonia.Platform.Storage;
 /// <summary>
 /// Options class for <see cref="IStorageProvider.OpenFilePickerAsync"/> method.
 /// </summary>
-public class FilePickerOpenOptions
+public class FilePickerOpenOptions : PickerOptions
 {
-    /// <summary>
-    /// Gets or sets the text that appears in the title bar of a file dialog.
-    /// </summary>
-    public string? Title { get; set; }
-        
-    /// <summary>
-    /// Gets or sets the initial location where the file open picker looks for files to present to the user.
-    /// </summary>
-    public IStorageFolder? SuggestedStartLocation { get; set; }
-        
     /// <summary>
     /// Gets or sets an option indicating whether open picker allows users to select multiple files.
     /// </summary>
     public bool AllowMultiple { get; set; }
-        
+
     /// <summary>
     /// Gets or sets the collection of file types that the file open picker displays.
     /// </summary>
     public IReadOnlyList<FilePickerFileType>? FileTypeFilter { get; set; }
-}
+}

src/Avalonia.Base/Platform/Storage/FilePickerSaveOptions.cs

@@ -5,13 +5,8 @@ namespace Avalonia.Platform.Storage;
 /// <summary>
 /// Options class for <see cref="IStorageProvider.SaveFilePickerAsync"/> method.
 /// </summary>
-public class FilePickerSaveOptions
+public class FilePickerSaveOptions : PickerOptions
 {
-    /// <summary>
-    /// Gets or sets the text that appears in the title bar of a file dialog.
-    /// </summary>
-    public string? Title { get; set; }
-
     /// <summary>
     /// Gets or sets the file name that the file save picker suggests to the user.
     /// </summary>
@@ -22,11 +17,6 @@ public class FilePickerSaveOptions
     /// </summary>
     public string? DefaultExtension { get; set; }
 
-    /// <summary>
-    /// Gets or sets the initial location where the file open picker looks for files to present to the user.
-    /// </summary>
-    public IStorageFolder? SuggestedStartLocation { get; set; }
-
     /// <summary>
     /// Gets or sets the collection of valid file types that the user can choose to assign to a file.
     /// </summary>

src/Avalonia.Base/Platform/Storage/FolderPickerOpenOptions.cs

@@ -3,20 +3,10 @@
 /// <summary>
 /// Options class for <see cref="IStorageProvider.OpenFolderPickerAsync"/> method.
 /// </summary>
-public class FolderPickerOpenOptions
+public class FolderPickerOpenOptions : PickerOptions
 {
-    /// <summary>
-    /// Gets or sets the text that appears in the title bar of a folder dialog.
-    /// </summary>
-    public string? Title { get; set; }
-
     /// <summary>
     /// Gets or sets an option indicating whether open picker allows users to select multiple folders.
     /// </summary>
     public bool AllowMultiple { get; set; }
-
-    /// <summary>
-    /// Gets or sets the initial location where the file open picker looks for files to present to the user.
-    /// </summary>
-    public IStorageFolder? SuggestedStartLocation { get; set; }
 }

src/Avalonia.Base/Platform/Storage/IStorageBookmarkItem.cs

@@ -17,5 +17,4 @@ public interface IStorageBookmarkFile : IStorageFile, IStorageBookmarkItem
 [NotClientImplementable]
 public interface IStorageBookmarkFolder : IStorageFolder, IStorageBookmarkItem
 {
-
 }

src/Avalonia.Base/Platform/Storage/IStorageFile.cs

@@ -14,7 +14,7 @@ public interface IStorageFile : IStorageItem
     /// Returns true, if file is readable.
     /// </summary>
     bool CanOpenRead { get; }
-        
+
     /// <summary>
     /// Opens a stream for read access.
     /// </summary>
@@ -24,9 +24,9 @@ public interface IStorageFile : IStorageItem
     /// Returns true, if file is writeable. 
     /// </summary>
     bool CanOpenWrite { get; }
-        
+
     /// <summary>
     /// Opens stream for writing to the file.
     /// </summary>
     Task<Stream> OpenWrite();
-}
+}

src/Avalonia.Base/Platform/Storage/IStorageFolder.cs

@@ -8,5 +8,4 @@ namespace Avalonia.Platform.Storage;
 [NotClientImplementable]
 public interface IStorageFolder : IStorageItem
 {
-
-}
+}

src/Avalonia.Base/Platform/Storage/IStorageItem.cs

@@ -27,7 +27,7 @@ public interface IStorageItem : IDisposable
     /// Browser and iOS backends might return relative uris.
     /// </remarks>
     bool TryGetUri([NotNullWhen(true)] out Uri? uri);
-        
+
     /// <summary>
     /// Gets the basic properties of the current item.
     /// </summary>
@@ -37,7 +37,7 @@ public interface IStorageItem : IDisposable
     /// Returns true is item can be bookmarked and reused later.
     /// </summary>
     bool CanBookmark { get; }
-        
+
     /// <summary>
     /// Saves items to a bookmark.
     /// </summary>

src/Avalonia.Base/Platform/Storage/IStorageProvider.cs

@@ -11,7 +11,7 @@ public interface IStorageProvider
     /// Returns true if it's possible to open file picker on the current platform. 
     /// </summary>
     bool CanOpen { get; }
-        
+
     /// <summary>
     /// Opens file picker dialog.
     /// </summary>
@@ -22,7 +22,7 @@ public interface IStorageProvider
     /// Returns true if it's possible to open save file picker on the current platform. 
     /// </summary>
     bool CanSave { get; }
-        
+
     /// <summary>
     /// Opens save file picker dialog.
     /// </summary>
@@ -33,13 +33,13 @@ public interface IStorageProvider
     /// Returns true if it's possible to open folder picker on the current platform. 
     /// </summary>
     bool CanPickFolder { get; }
-        
+
     /// <summary>
     /// Opens folder picker dialog.
     /// </summary>
     /// <returns>Array of selected <see cref="IStorageFolder"/> or empty collection if user canceled the dialog.</returns>
     Task<IReadOnlyList<IStorageFolder>> OpenFolderPickerAsync(FolderPickerOpenOptions options);
-        
+
     /// <summary>
     /// Open <see cref="IStorageBookmarkFile"/> from the bookmark ID.
     /// </summary>

src/Avalonia.Base/Platform/Storage/PickerOptions.cs

@@ -0,0 +1,17 @@
+namespace Avalonia.Platform.Storage;
+
+/// <summary>
+/// Common options for <see cref="IStorageProvider.OpenFolderPickerAsync"/>, <see cref="IStorageProvider.OpenFilePickerAsync"/> and <see cref="IStorageProvider.SaveFilePickerAsync"/> methods. 
+/// </summary>
+public class PickerOptions
+{
+    /// <summary>
+    /// Gets or sets the text that appears in the title bar of a folder dialog.
+    /// </summary>
+    public string? Title { get; set; }
+
+    /// <summary>
+    /// Gets or sets the initial location where the file open picker looks for files to present to the user.
+    /// </summary>
+    public IStorageFolder? SuggestedStartLocation { get; set; }
+}

src/Avalonia.Base/Platform/Storage/StorageItemProperties.cs

@@ -16,7 +16,7 @@ public class StorageItemProperties
         DateCreated = dateCreated;
         DateModified = dateModified;
     }
-        
+
     /// <summary>
     /// Gets the size of the file in bytes.
     /// </summary>
@@ -40,4 +40,4 @@ public class StorageItemProperties
     /// Can be null if property is not available.
     /// </remarks>
     public DateTimeOffset? DateModified { get; }
-}
+}